EP1154578A3 - High-speed turbo decoder - Google Patents

High-speed turbo decoder Download PDF

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Publication number
EP1154578A3
EP1154578A3 EP01111572A EP01111572A EP1154578A3 EP 1154578 A3 EP1154578 A3 EP 1154578A3 EP 01111572 A EP01111572 A EP 01111572A EP 01111572 A EP01111572 A EP 01111572A EP 1154578 A3 EP1154578 A3 EP 1154578A3
Authority
EP
European Patent Office
Prior art keywords
computation
stages
metrics
acs
turbo decoder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01111572A
Other languages
German (de)
French (fr)
Other versions
EP1154578B1 (en
EP1154578A2 (en
Inventor
Tsuguo Maru
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP1154578A2 publication Critical patent/EP1154578A2/en
Publication of EP1154578A3 publication Critical patent/EP1154578A3/en
Application granted granted Critical
Publication of EP1154578B1 publication Critical patent/EP1154578B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/3905—Maximum a posteriori probability [MAP] decoding or approximations thereof based on trellis or lattice decoding, e.g. forward-backward algorithm, log-MAP decoding, max-log-MAP decoding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/29—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
    • H03M13/2957—Turbo codes and decoding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/3905—Maximum a posteriori probability [MAP] decoding or approximations thereof based on trellis or lattice decoding, e.g. forward-backward algorithm, log-MAP decoding, max-log-MAP decoding
    • H03M13/3922—Add-Compare-Select [ACS] operation in forward or backward recursions
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/395—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using a collapsed trellis, e.g. M-step algorithm, radix-n architectures with n>2
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/61—Aspects and characteristics of methods and arrangements for error correction or error detection, not provided for otherwise
    • H03M13/615—Use of computational or mathematical techniques
    • H03M13/616—Matrix operations, especially for generator matrices or check matrices, e.g. column or row permutations

Landscapes

  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • General Physics & Mathematics (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Algebra (AREA)
  • Computing Systems (AREA)
  • Error Detection And Correction (AREA)
  • Detection And Correction Of Errors (AREA)
  • Picture Signal Circuits (AREA)

Abstract

A high-speed turbo decoder using a BCJR (Bahl, Cocke, Jelinek, and Raviv) algorithm or a BCJR algorithm which makes approximation by ACS computation (Add-Compare-Select computation) includes a means for supplying a plurality of pipelined stages of gamma metrics as a section for performing at least one of alpha metric computation and beta metric computation in the BCJR algorithm, an ACS computation means which is constituted by a plurality of stages of cascade connections and receives the plurality of pipelined gamma metrics, a means which receives a computation result obtained by the ACS computation means and updates state metrics every plurality of stages (K stages), and a memory for storing state metrics for every K stages (Fig. 1)
EP01111572.2A 2000-05-12 2001-05-11 High-speed turbo decoder Expired - Lifetime EP1154578B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000139493 2000-05-12
JP2000139493A JP3613134B2 (en) 2000-05-12 2000-05-12 High speed turbo decoder

Publications (3)

Publication Number Publication Date
EP1154578A2 EP1154578A2 (en) 2001-11-14
EP1154578A3 true EP1154578A3 (en) 2003-07-23
EP1154578B1 EP1154578B1 (en) 2015-01-21

Family

ID=18646926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111572.2A Expired - Lifetime EP1154578B1 (en) 2000-05-12 2001-05-11 High-speed turbo decoder

Country Status (4)

Country Link
US (1) US7133472B2 (en)
EP (1) EP1154578B1 (en)
JP (1) JP3613134B2 (en)
CA (1) CA2347446C (en)

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SG113431A1 (en) 2002-08-30 2005-08-29 Oki Techno Ct Singapore Pte Improved turbo decoder
US7107509B2 (en) 2002-08-30 2006-09-12 Lucent Technologies Inc. Higher radix Log MAP processor
TWI350066B (en) * 2003-04-17 2011-10-01 Icera Inc Apparatus and method for turbo decoder termination
WO2005117273A1 (en) 2004-05-26 2005-12-08 Nec Corporation Spatially-multiplexed signal detecting method and time space iterative decoder using same
GB2416967B (en) * 2004-07-29 2007-01-31 Toshiba Res Europ Ltd Turbo equalization in a MIMO digital wireless wideband system
US7607072B2 (en) * 2005-01-28 2009-10-20 Agere Systems Inc. Method and apparatus for-soft-output viterbi detection using a multiple-step trellis
US7917834B2 (en) 2005-12-08 2011-03-29 Electronics And Telecommunications Research Institute Apparatus and method for computing LLR
KR100850744B1 (en) 2005-12-08 2008-08-06 한국전자통신연구원 LLR computing device and method
JP2009246474A (en) * 2008-03-28 2009-10-22 Fujitsu Ltd Turbo decoder
JP5229062B2 (en) * 2009-03-31 2013-07-03 日本電気株式会社 Ultrafast turbo decoder and ultrafast turbo detector
JP5523970B2 (en) * 2010-07-28 2014-06-18 三洋電機株式会社 Metric calculation device and decoder

Citations (1)

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US6028899A (en) * 1995-10-24 2000-02-22 U.S. Philips Corporation Soft-output decoding transmission system with reduced memory requirement

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US5933462A (en) * 1996-11-06 1999-08-03 Qualcomm Incorporated Soft decision output decoder for decoding convolutionally encoded codewords
US6161209A (en) * 1997-03-28 2000-12-12 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Industry Through The Communications Research Centre Joint detector for multiple coded digital signals
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Also Published As

Publication number Publication date
JP2001320282A (en) 2001-11-16
EP1154578B1 (en) 2015-01-21
US7133472B2 (en) 2006-11-07
US20020062471A1 (en) 2002-05-23
CA2347446A1 (en) 2001-11-12
JP3613134B2 (en) 2005-01-26
CA2347446C (en) 2007-07-10
EP1154578A2 (en) 2001-11-14

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